Gotowe bibliografie tematyczne / Hearth

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Gotowa bibliografia na temat „Hearth”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 30 maja 2022

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Artykuły w czasopismach na temat "Hearth"

O’Brien, Karen. "Companions of Heart and Hearth". Journal of Family History 39, nr 3 (21.05.2014): 183–203. http://dx.doi.org/10.1177/0363199014532413.

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John O'Brien. "HEART AND HEARTH: SOME VERSIONS OF SECRECY". Modern Language Review 108, nr 4 (2013): 1103. http://dx.doi.org/10.5699/modelangrevi.108.4.1103.

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Bassett, Barbara. "Home and Hearth". Ata: Journal of Psychotherapy Aotearoa New Zealand 21, nr 1 (31.12.2017): 17–27. http://dx.doi.org/10.9791/ajpanz.2017.03.

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While it is generally agreed that family time nourishes the young, gives purpose to those in middle years and accompanies the elders, the reality is that family time competes with contemporary social trends such as increased use of social media, the reality of dispersed families, or contends with the need or wish of caregivers to work outside the home; all of which create a life-in-the-fast-lane pace of living. However, “hearth-time”, as a metaphor for a warm place to arrive at and feel a sense of belonging, is alive with potential in Aotearoa New Zealand. This paper aims to identify and highlight the potentials that support the benefits of the hearth and time spent together and, by reviewing the origins and purpose of the hearth, build awareness of already existing hearth potentials; including our consulting rooms and the hearth-tending dynamics that abide within. To support the notion that hearth and subsequent primacy of heartfelt experiences needs more centrality in our homes, communities and even our thinking, I will draw on and extrapolate from the Greek myth of Hestia, Virgin Goddess of the hearth, drawing parallels between the principles of the myth and the value our profession and cultures offer. Whakarāpopotonga Ahakoa, ki tā te nuinga, e whakaaehia ana ko te wā o te whānau te wā poipoihia ai ngā kōhungahunga, whai hua ai ngā pākeke, whai takahoa ai ngā kuia, koroua, ki te āta matawaihia e whakataetae kē ana tēnei wā ki ngā mahi omaoma haeretanga ki te whai oranga i roto i tēnei ao hurihuri. Heoi anō, kua whakaritea he “wā takuahi” hai wāhi taunga mahana kia rongo ai i te kiritau o te tūrangawaewae, e torohū ake ana i Aotearoa nei. Ko te whāinga a tēnei pepa he tohu kātahi ka whakahira ake i ngā torohūnga tautoko i ngā painga o tēnei wāhi arā te takuahi, me te wā noho tahi ai. Mā te tātari haeretanga i ngā tīmatatanga me ngā take o te takuahi e whakarahi ake ngā rongo o ngā huanga takuahi me ō tātau wāhi haumanu me ōna whakahaerenga takuahi. Hai tautoko ake i te whakaaro ko te tauahi me te hiranga o ngā wheako manawapā whakaarahia ake me whai wāhi ki waenganui i ō tātau kāinga, hāpori me ō tātau whakaaro hoki. Ka huri au ki te pūrākau a ngā Kiriki mō Hētia te Atua Puhi o te takuahi, hai whakaatu i ngā ōritenga i waenga i ngā mātāpono o te pūrākau me te ūara o tō tātau ūmangae me o tātau ahurei.

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Mason, H. A. "The Hallowed Hearth". Cambridge Quarterly XIV, nr 3 (1985): 205–39. http://dx.doi.org/10.1093/camqtly/xiv.3.205.

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Fletcher, Ronald. "Hearth and home". Society 31, nr 1 (listopad 1993): 55–60. http://dx.doi.org/10.1007/bf02693387.

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Palmor, Lauren. "Exploding the Hearth". Age, Culture, Humanities: An Interdisciplinary Journal 2 (1.01.2015): 185–201. http://dx.doi.org/10.7146/ageculturehumanities.v2i.130743.

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The image of the aged parent or grandparent sitting contentedly before the hearth is a canonical trope in Victorian visual culture. The freside was, at that time, a signifcant center of the home and family, and older members of the household were viewed as principal organizing forces around this central gathering place. This article examines the archetypal image of the senescent hearthside fgure in order to better evaluate the larger context in which Victorian aging was visually interpreted and generally understood. By examining depictions of this theme by the popular British painters Walter Dendy Sadler and Frederick Daniel Hardy, this study demonstrates some ways in which art history may proft from age studies in formulating expanded readings of such material.

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Belyaeva, Valentina. "Hearths and hearth structures of the Pushkari I Upper Paleolithic settlement". Camera Praehistorica, nr 1 (czerwiec 2021): 47–62. http://dx.doi.org/10.31250/2658-3828-2021-1-47-62.

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At the Pushkari I Upper Paleolithic settlement three settlement complexes with dwellings, activity areas, and hearths have been excavated. All eight hearth of the Pushkari I site located in different parts of the cultural horizon are however territorially close to each other and identical as to their geological and cultural attribution. A comparative analysis of the hearths was aimed on reconstruction of ways of their construction and using. The study was based on a simple indication of the location of hearths found on three part of the settlement (Excavations II, V and VII) —outside and inside dwellings. As a result of the study, three groups of hearth structures, which were used in different ways, were identified. The most important feature of the “outdoor” hearths is numerous pits and depressions at their base. Investigating their shape, carbonaceous bone remains, and ethnogra- phic examples, we concluded that the large outdoor hearths were used as cooking areas. Meat could be fried on bones inserted vertically into the hearths. In some cases the hearths could be the centers of working activity areas (Excavation V). The hearths inside the dwellings were small in size and were surrounded by a number of specially working activity areas. These hearths were primarily used for dwelling heating (Excavations II and V). They could also carry some economic functions. The hearth inside the dwelling (Excavation VII) has all the characteristics of an external “kitchen” hearth, but also it had a secondary carbonaceous filling brought from outside. Such a hearth structure could be a heating and kitchen object in a special-purpose dwelling.

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Ni, Ao, Chengzhi Li, Wei Zhang, Zhixin Xiao, Dongliang Liu i Zhengliang Xue. "Investigation of the Hearth Erosion of WISCO No. 1 Blast Furnace Based on the Numerical Analysis of Iron Flow and Heat Transfer in the Hearth". Metals 12, nr 5 (15.05.2022): 843. http://dx.doi.org/10.3390/met12050843.

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The campaign life of a blast furnace is largely limited by the erosion state of its hearth section. Therefore, the study of hearth erosion is important for blast furnace ironmaking. In this study, the hearth erosion of the WISCO No. 1 blast furnace was investigated in combination with the numerical analysis of the iron flow and heat transfer in the hearth. The distributions of the wall shear stress and the temperature in the hearth were simulated and the hearth sections with high erosion risk were discussed. The hearth lining with higher shear stress is generally located near the taphole region and the 1423 K isotherm is totally located inside the hearth lining structure, with a deeper position in the central part of the hearth bottom. Based on the measurement data from the hearth damage investigation, the erosion state of the hearth bottom and the lower part of the hearth sidewall is more serious. The erosion line at the hearth bottom showed a typical “pot-bottom” shaped contour and for the hearth corner section, the average erosion depth was about 1/3 of the total wall thickness. The empirical expressions between the hearth erosion depth and the wall shear stress and the temperature were established. Moreover, the effects of key iron tapping factors on the wall shear stress and the effect of the hearth’s refractory structure on the heat transfer in the hearth are respectively discussed, aiming to provide more suggestions for hearth protection.

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Newman, Peter. "Dry Hearth Melting Furnaces". Materials Science Forum 630 (październik 2009): 103–10. http://dx.doi.org/10.4028/www.scientific.net/msf.630.103.

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This paper outlines various aluminium melting furnaces arrangement alternatives and their related benefits as well as the physical and practical challenges of the aluminium melting process using fuel fired reverberatory furnaces. Performance comparisons are made between dry hearth and wet hearth furnaces to highlight the benefits of dry hearth melting as well as the impact of melting practice on ultimate equipment performance. Both single chamber and twin chamber dry hearth furnaces are described in various configurations including the unique benefits of each design.

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Ramspeck, Doug. "Gathering at the Hearth". Prairie Schooner 92, nr 1 (2018): 101. http://dx.doi.org/10.1353/psg.2018.0028.

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Rozprawy doktorskie na temat "Hearth"

Jarosz, Maxwell A. (Maxwell Albert). "Toxic urbanism : hearth, heimatlosigkeit, home". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108934.

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Thesis: M. Arch., Massachusetts Institute of Technology, Department of Architecture, 2017.
Cataloged from PDF version of thesis. Page 123 blank.
Includes bibliographical references (pages 121-122).
In an increasingly toxic world where the average person's body contains 29/35 of the toxins listed on the restricted and hazardous substance list, toxicity is unavoidable. This thesis asks how toxins can re-imagined to become active agents in design. Through the negotiation between hard and soft boundaries this work speculates on an architecture of gradients, densities, and velocities to produce temporal spaces of occupation. The year is 2024. Humanity has settled in a condition of toxic urbanism, contained by the toxic wastelands of the periphery. The Anthropocene has wreaked havoc and produced a world of toxins. Early estimates of the exponential destruction caused by our toxic landscapes of production were misled by constantly shifting metrics of toxicity provided by different agencies, bureaus, and offices. Our remediation efforts were too slow, too costly, and failed to produce any agency in the age of toxicity.We continued to produce superfund sites across the country. Landscapes of toxic air, contaminated soil and polluted water became our second nature. As we shifted from one machine age to the next, the continued autonomy provided to production landscapes allowed increasingly more toxic means of production to be developed, this methodology assured there would be no post-toxic future. Within the confines of toxic urbanism, people suited up in protective suits every day. They wore protection more for peace of mind than protection of body. As we destroyed the land, the interior was perfected, continuous halls stocked with machinery created a perfectly sterile environment that defined people's lives, the sprawling mechanized interiors of the no-stop city had finally been realized. We had come a long way. Ever since humanity created the cave fire, toxins had been part of our environment. The hearth, originally acted as both an object of environment and an object of culture. As we followed the flames into modernism we found ourselves in a state of homelessness explicated by the dichotomy between our technological culture and its toxic means of production. Heidegger, described the sensation as Heimatlosigkeit, the signification of our existential orientation in the era of Gestell. Humanity has however always been a risk adverse society, and as they began to reject the sterile environments of safety for toxic environments of experience agency was produced in the design of toxins. In an increasingly toxic world, this thesis explores how toxins can become active participants and drivers for the production of temporal spaces defined by the hard and soft boundaries they operate within. Architectural interests in materiality and dimension are replaced in favor of velocities, gradients, and densities that define zones of occupiability.
by Maxwell A. Jarosz.
M. Arch.

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Parkinson, Elizabeth. "The Glamorgan hearth tax assessment of 1670 /". Cardiff : South Wales record society, 1994. http://catalogue.bnf.fr/ark:/12148/cb36681642q.

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Swartling, Maria. "A Study of the Heat Flow in the Blast Furnace Hearth Lining". Doctoral thesis, KTH, Tillämpad processmetallurgi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-13163.

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The aim of the present thesis was to study the heat flows in the blast furnace hearth lining by experimental measurements and numerical modeling. Thermocouple data from an operating furnace have been used throughout the work, to verify results and to develop methodologies to use the results in further studies. The hearth lining were divided into two zones based on the thermocouple readings: a region with regular temperature variations due to the tapping of the furnace, and another region with slow temperature variations. In an experimental study, the temperatures of the outer surfaces of the wall and bottom were measured and compared with lining temperature measured by thermocouples. Expressions to describe the outer surface temperature profiles were derived and used as input in a two-dimensional steady state heat transfer model. The aim of the study was to predict the lining temperature profiles in the region subjected to slow temperature variations. The methodology to calculate a steady state lining temperature profile was used as input to a three-dimensional model. The aim of the three-dimensional model was primarily to study the region with dynamic lining temperature variations caused by regular tappings. The study revealed that the replacement of original lining with tap clay has an effect when simulating the quasi-stationary temperature variations in the lining. The study initiated a more detailed study of the taphole region and the size and shape of the tap clay layer profile. It was concluded, that in order to make a more accurate heat transfer model of the blast furnace hearth, the presence of a skull build-up below the taphole, erosion above the taphole and the bath level variations must to be taken into consideration.
QC 20100706

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Rappaport, Margaret Boone, i Christopher Corbally. "THE HUMAN HEARTH AND THE DAWN OF MORALITY". WILEY-BLACKWELL, 2016. http://hdl.handle.net/10150/622575.

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Stunned by the implications of Colage's analysis of the cultural activation of the brain's Visual Word Form Area and the potential role of cultural neural reuse in the evolution of biology and culture, the authors build on his work in proposing a context for the first rudimentary hominin moral systems. They cross-reference six domains: neuroscience on sleep, creativity, plasticity, and the Left Hemisphere Interpreter; palaeobiology; cognitive science; philosophy; traditional archaeology; and cognitive archaeology's theories on sleep changes in Homo erectus and consequences for later humans. The authors hypothesize that the human genome, when analyzed with findings from neuroscience and cognitive science, will confirm the evolutionary timing of an internal running monologue and other neural components that constitute moral decision making. The authors rely on practical modern philosophers to identify continuities with earlier primates, and one major discontinuitysome bright white moral line that may have been crossed more than once during the long and successful tenure of Homo erectus on Earth.

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Tripp, David William. "The thermal regime during electron beam hearth remelting". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26748.

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Electron beam hearth remelting is extensively used in refining of superalloys, titanium alloys and the recycling of these materials. The removal of impurities and exhogenous particles during the hearth melting operation depends primarily on the time at temperature relationship developed within a pool of molten metal. In the past hearth melters have acted largely on empirical evidence to specify such parameters as melt rates, power levels and skull sizes. This work describes a mathematical model which could be used to predict certain parameters (such as pool volume or alloy element evaporation rates) when given skull geometry, power input and melt rate. A three dimensional steady state heat transfer model of both the skull and water cooled copper mould during electron beam hearth remelting has been developed. The model has been used to investigate the effects of surface temperature, liquid motion, power input, skull geometry, presence of the hearth mould and melt rate on parameters such as pool volume during skull melting. In general the choice of any combination of operating parameters depends on a balance between the refining capacity of the process (i.e. liquid volume) and the loss of alloy elements by evaporation. In the case of melting pure materials (e.g. CP titanium) the balance is between refining capacity and efficient energy use. It was found that forced convection is significantly more effective in increasing the volume of the liquid pool than any other single parameter. Increasing the power input to the skull, increasing the skull width and removing the water cooled copper mould from around the skull also increase the pool volume. The evaporation rates of alloy elements within the skull were most effected by changes in the power distribution and the degree of liquid motion.
Applied Science, Faculty of
Materials Engineering, Department of
Graduate

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Fox, Gwyn. "Hearts in the hearth: seventeenth-century women's sonnets of love and friendship in Spain and Portugal". Thesis, University of Auckland, 2004. http://hdl.handle.net/2292/2132.

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This study contributes to the growing body of knowledge about the realities of women's lives in the seventeenth-century Iberian peninsula, through a socio-historical interpretation of the poetic production of five women. One is Portuguese, Violante del Cielo, and four are Spaniards: Luisa de Carvajal y Mendoza, Leonor de la Cueva y Silva, Marcia Belisarda and Catalina Clara Ramírez de Guzmán. All are from the educated upper or noble classes and their lives span some one hundred and forty years, from 1566 to 1693. The thesis focuses particularly on their sonnets of love and friendship, both secular and religious. The sonnet was specifically chosen as the vehicle to study the ideas and concerns of literate, seventeenth-century women. As a difficult form of poetry requiring wit, artistry and education, sonnets enable a display of intellectual capabilities and offer opportunities for veiled criticism of contemporary systems of control. These women do not overtly rail against a system that offers them much in terms of social advancement and privilege. However, they do re-write our understanding of the Baroque by presenting their interests, pleasures and discontents from a feminine viewpoint. This detailed, contextual study of women's works, set against the philosophical, religious and moral treatises that governed their age, enables a wider interpretation of women's thought and intentions in the Iberian peninsula than may hitherto have been acknowledged, particularly in terms of relationships of affection within the family. Collectively, their individual works display a determination to demonstrate women's intelligence and moral strength. Furthermore, it becomes clear that women living within a system that utilised biological determinism as proof that they were incapable of reason, strive in their works to show that they are both capable of reason and determined to demonstrate it as undeniable fact.

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Swartling, Maria. "An Experimental and Numerical Study of the Heat Flow in the Blast Furnace Hearth". Licentiate thesis, Stockholm : Division of Applied Process Metallurgy, Royal Institute of Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9922.

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Carsten, Janet. "The heat of the hearth : the process of kinship in a Malay fishing community /". Oxford : Clarendon press, 1997. http://catalogue.bnf.fr/ark:/12148/cb36699082f.

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Bean, Ian James Materials Science &amp Engineering Faculty of Science UNSW. "Blast furnace hearth drainage improvement of the residual - flowout correlation". Publisher:University of New South Wales. Materials Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41490.

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Experimental cold modelling of hearth drainage was performed at Bluescope Steel Research Laboratories to understand the impact of variable drainage rate on slag removal. These drainage studies were designed to simulate real operational aspects such as: continuous casting, variable tapping rate and inflow liquid distribution. During the analysis of these drainage experiments it was demonstrated that the residual-flowout correlation in use since the 1970??s may possibly be incomplete or inaccurate. The removal of slag from the blast furnace hearth is the greater concern of the two liquids produced in the iron making process. In the 1970??s operational difficulties arose when large volumes of residual slag remained in the furnace after casting. This prompted research related to the flow of viscous liquids through uniformly packed beds providing fundamental insight on the most effective means of removal of slag from the blast furnace hearth. The core subject of this study, the residual-flowout correlation developed by Fukutake and Okabe that is used to predict cast duration and liquid accumulation in the blast furnace hearth is discussed in detail. The residual-flowout correlation is examined for four different sets of conditions based on constant or increasing slag drainage, with and without liquid dripping. The outcome of this study will improve our understanding of the residual-flowout relationship and develop it further, so that drainage conditions whether for constant or increasing drainage rates, with or without dripping, will hold using the one general Fl equation.

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Husbands, C. R. "The hearth tax and the structure of the English economy". Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372295.

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Książki na temat "Hearth"

Hillman, Kathy. From hearth to heart. Venice, FL: Eldridge Publishing, 1998.

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Reece, Colleen L. Hearth of fire. Waterville, Me: Thorndike Press, 2009.

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Skoglund, Elizabeth. The welcoming hearth. Wheaton, Ill: Tyndale House Publishers, 1993.

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The devil's hearth. New York: St. Martin's Minotaur, 2003.

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DePoy, Phillip. The devil's hearth. Waterville, Me: Wheeler Pub., 2005.

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DePoy, Phillip. The devil's hearth. Toronto: Worldwide, 2004.

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Reece, Colleen L. Hearth of fire. Uhrichsville, Ohio: Barbour Pub., 1998.

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DePoy, Phillip. The devil's hearth. Toronto: Worldwide, 2004.

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Voida, George. Upon the hearth. [Albuquerque, N.M.?]: G. Voida, 1990.

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Archive, North West Sound. Hearth and home. Clitheroe: North West Sound Archive, 1995.

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Części książek na temat "Hearth"

Khan, Nyla Ali. "Home and Hearth". W The Life of a Kashmiri Woman, 90–96. New York: Palgrave Macmillan US, 2014. http://dx.doi.org/10.1057/9781137463296_9.

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Pickering, Judith. "An open heart and an open hearth". W The Search for Meaning in Psychotherapy, 27–44. Abingdon, Oxon ; New York, NY : Routledge, 2019.: Routledge, 2019. http://dx.doi.org/10.4324/9781315639581-3.

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Liu, Yuncai. "To Activize the Hearth". W The Operation of Contemporary Blast Furnaces, 9–50. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-7074-2_2.

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Short, Sue. "Heart and Hearth: The Cyborg and Family Values". W Cyborg Cinema and Contemporary Subjectivity, 133–59. London: Palgrave Macmillan UK, 2005. http://dx.doi.org/10.1057/9780230513501_7.

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Doyal, Lesley. "Hazards of Hearth and Home". W What Makes Women Sick, 27–58. London: Macmillan Education UK, 1995. http://dx.doi.org/10.1007/978-1-349-24030-2_2.

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Tuan, Yi-Fu. "Cosmos and Hearth in China". W The GeoJournal Library, 117–36. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-2392-3_8.

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Barraclough, William F. "Rotary Hearth Calcining of Petroleum Cokes". W The Minerals, Metals & Materials Series, 1189–95. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72284-9_155.

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Kato, Akira. "Roller Hearth Kiln for Chinaware Production". W Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 13, Issue 1/2, 222–23. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470313916.ch24.

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Lee, Christina. "Home Is Where the Hearth Was". W Spectral Spaces and Hauntings, 51–69. 1 [edition]. | New York: Routledge, 2017. | Series: Routledge research in cultural and media studies; 105: Routledge, 2017. http://dx.doi.org/10.4324/9781315719115-4.

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Roy, Shibani. "Hearth to Heaven: Ritualization of Food". W Food and Power: Expressions of Food-Politics in South Asia, 223–49. B1/I-1 Mohan Cooperative Industrial Area, Mathura Road New Delhi 110 044: SAGE Publications Pvt Ltd, 2020. http://dx.doi.org/10.4135/9789353886059.n12.

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Streszczenia konferencji na temat "Hearth"

Johnson, Jeramiah. "Hearth and home". W SIGGRAPH '18: Special Interest Group on Computer Graphics and Interactive Techniques Conference. New York, NY, USA: ACM, 2018. http://dx.doi.org/10.1145/3209800.3232897.

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Vernengo, Steven, Rade Milanovic, Chenn Q. Zhou, Pinakin Chaubal i D. Huang. "Computations of Liquid Flow and Heat Transfer in the Hearth of a Blast Furnace". W ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-55504.

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A blast furnace is a key facility in iron and steel making to convert iron oxides into liquid iron. The furnace campaign life is critical to the economic vitality of an integrated steel mill. The wearing of hearth refractories is widely recognized as the main limitation for a long campaign blast furnace life. Distribution of liquid iron flow and refractory temperatures have a significant influence on hearth wear. It is identified that the use of modern advanced techniques such as Computational Fluid Dynamics (CFD) provide the most cost effective solution to gauge the condition of the hearth and understand the reason for changes. In this research, a large commercial scale blast furnace hearth has been simulated using a comprehensive CFD model based on a simplified structure of deadman. The liquid iron flow pattern, temperature distribution in the liquid and the refractories, and the wearing profile in the hearth have been analyzed. A limited parametric study has also been performed. The results are promising and will be presented in the paper.

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Guo, B. Y., D. Maldonado, P. Zulli i A. B. Yu. "SIMULATION OF FLOW AND HEAT TRANSFER IN BLAST FURNACE HEARTH". W Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p22.260.

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Zhang, Yu, Rohit Deshpande, D. Huang, Pinakin Chaubal i Chenn Q. Zhou. "A Methodology for Blast Furnase Hearth Wear Analysis". W ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15144.

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The wear of a blast furnace hearth and the hearth inner profile are highly dependent on the liquid iron flow pattern, refractory temperatures, and temperature distributions at the hot face (the interface between the liquid iron and refractory or the skull). A 3-D CFD hearth model has been developed for predict the hearth erosion and its inner profile. The detailed computation results show that the hot face temperature is location dependant. Based on these discoveries, a new methodology along with new algorithms is established to calculate the hearth erosion and its inner profile. The methodology is to estimate the hearth primary inner profile based on 1-D heat transfer, and to compute the hot face temperature using the 3-D CFD hearth model according to the 1-D pre-estimated and re-estimated profiles. After the hot face temperatures are converged, the hot face positions are refined by a new algorithm, which is based on the difference between the calculated and measured results. The finalized CFD prediction temperatures are in good agreement with the experimental results except at or near the corner and taphole regions. In this paper, the detailed methodology and the new algorithm are presented along with the examples of hearth erosion and inner profile predictions.

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Kurzawski, Andrew, Ofodike A. Ezekoye, Michael Baldea i Thomas F. Edgar. "Comparison of Modeling Approaches for Open-Fire Hearth Furnace Heat Transfer". W ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52853.

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Modeling of heat transfer processes for controls applications requires that the modeler make a set of assumptions that strikes a balance between accuracy and simulation run time. Common points of consideration include choosing the appropriate dimension of the model, the importance of transient effects, numerical and temporal discretization, etc. The results of these decisions directly impact the speed and accuracy of the model. It can be useful for the modeler to build a framework containing a set of models for a given system where each model contains a different set assumptions. This allows for easy comparison of different classes of models and aids in the decision process for selecting the model that best fits the needs of the user. This work takes the modeling of an open-flame hearth furnace as a case study and examines the implications of different modeling simplifications. This scenario is similar to plug-flow reactors (PFRs) and continuous stirred-tank reactors (CSTRs) in that reactions are occurring in a chamber where mass is flowing in to and out of the system. Modeling of these systems focuses on the concentration of the reactants, whereas the hearth furnace model seeks to capture the heat transfer to the work-piece and walls. Numerous models of PRFs and CSTRs exist in literature as well as several open-fire furnace models using Hottel’s zone method. This work builds off of these modeling techniques by testing several types of models for speed and accuracy. Both steady-state and transient operation are considered and each of the different heat transfer phenomena are modeled in varying dimensions. The open-flame environment inside the furnace produces gases that participate in radiative heat transfer for which there are a number of different models. The P1 approximation to the method of spherical harmonics is used, both in three dimensions and a simplification to one dimensional radiation. The flow of gases inside the furnace is considered to be plug flow with a series of burners injecting hot gases along the length of the furnace. Conduction to the walls and work-piece occurs at much longer time scales than convection, i.e. the combustion gases are moving through the furnace much faster than the characteristic thermal response time of the walls and work-pieces (τgas ≪ τwall). This brings the modeler to the question of how to model transient effects at such disparate time scales. A model is posited that is a combination of quasi-steady radiative heat transfer, transient fluid evolution, and lumped transient conduction. This formulation takes advantage of the disparity in time scales to take large steps in time when solving the radiation equation while solving the energy equation at each time step for the internal gas control volumes. This model is then compared on the grounds of speed and accuracy to the more traditional explicit advancement of a consistent time step in both the gas energy balance and radiative transfer solution.

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Yan, Fang, Chenn Q. Zhou, D. Huang i Pinakin Chaubal. "Numerical Investigation of Cooling Strategy for Reducing Blast Furnace Hearth Erosions". W ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72633.

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Hearth wearing is the key limit of a blast furnace campaign life. Hot metal flow pattern and temperature distributions are the two key variables to determine the rate and style of the hearth wearing. There are several strategies to control and reduce the hearth erosion, such as changing cooling water temperature and changing the heat transfer coefficient. In this paper, both cooling strategies are investigated using a comprehensive computational fluid dynamics (CFD) code, which was developed specifically for the simulation of blast furnace hearth. That program can predict the liquid flow patterns and temperature distributions of the hot metal as well as temperature profiles in the hearth refractory materials under different conditions. The results predicted by the CFD code were compared with actual industrial operation data. The cooling strategies are evaluated based on the energy analysis and effect on the hearth erosion.

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Muresan, V., i M. Abrudean. "Temperature control in the furnace with rotary hearth". W 2010 IEEE International Conference on Automation, Quality and Testing, Robotics (AQTR 2010). IEEE, 2010. http://dx.doi.org/10.1109/aqtr.2010.5520883.

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Patel, S. J. "Evaluation of Cold Hearth Refined Inconel Alloy 718". W Superalloys. TMS, 1991. http://dx.doi.org/10.7449/1991/superalloys_1991_43_51.

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Samuelsson, E., G. E. Maurer, M. E. Schlienger, R. E. Haun i J. S. Krafcik. "Plasma Cold Hearth Remelting of UDIMET Alloy 718". W Superalloys. TMS, 1992. http://dx.doi.org/10.7449/1992/superalloys_1992_195_204.

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Lur’ye, V. "Hearth constructions at settlements of the Afanasyevskaya culture". W Archaeological sites of Southern Siberia and Central Asia: from the appearance of the first herders to the epoch of the establishment of state formations. Institute for the History of Material Culture of the Russian Academy of Sciences, 2021. http://dx.doi.org/10.31600/978-5-907298-16-3.44-47.

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Raporty organizacyjne na temat "Hearth"

Pollak, Robert. Bargaining Around the Hearth. Cambridge, MA: National Bureau of Economic Research, maj 2007. http://dx.doi.org/10.3386/w13142.

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Aycock, M., D. Coordes, J. Russell, W. TenBrook i P. Yimbo. Preliminary Hazards Analysis Plasma Hearth Process. Office of Scientific and Technical Information (OSTI), listopad 1993. http://dx.doi.org/10.2172/140497.

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Siap, David, Henry Willem, Sarah K. Price, Hung-Chia Yang i Alex Lekov. Survey of Hearth Products in U.S. Homes. Office of Scientific and Technical Information (OSTI), lipiec 2017. http://dx.doi.org/10.2172/1398506.

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Lu, Wei-Kao, i Paul Debski. Paired Straight Hearth Furnace - Transformational Ironmaking Process. Office of Scientific and Technical Information (OSTI), listopad 2014. http://dx.doi.org/10.2172/1340663.

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Wu, A. S., S. G. Torres, T. P. Pluschkell, A. DeMint, B. R. Shelly, J. I. Jones, T. Boutaleb i in. Alloying titanium and niobium via electron beam cold hearth melting. Office of Scientific and Technical Information (OSTI), wrzesień 2019. http://dx.doi.org/10.2172/1603870.

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McKoon, R. H. Progress toward uranium scrap recycling via electron beam cold hearth refining. Office of Scientific and Technical Information (OSTI), grudzień 1994. http://dx.doi.org/10.2172/90717.

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McKoon, R. H. Progress toward uranium scrap recycling via Electron Cold Hearth Refining (EBCHR). Office of Scientific and Technical Information (OSTI), grudzień 1994. http://dx.doi.org/10.2172/95176.

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Gist, Ryan. Heart of the Hearth: Making the Popular Clean, Not the Clean Popular - Technology Research, Development, and Tools for Clean Biomass Cookstoves. Office of Scientific and Technical Information (OSTI), grudzień 2016. http://dx.doi.org/10.2172/1337926.

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Powell, A., U. Pal i J. van den Avyle. Optimal beam pattern to maximize inclusion residence time in an electron beam melting hearth. Office of Scientific and Technical Information (OSTI), luty 1997. http://dx.doi.org/10.2172/432999.

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Pollack, Brian R. Establishing isokinetic flow for a plasma torch exhaust gas diagnostic for a plasma hearth furnace. Office of Scientific and Technical Information (OSTI), maj 1996. http://dx.doi.org/10.2172/582269.

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